Interesting, but the Ampera CPU starts at around 800 USD.It takes a couple days to a week for me to build ROCm from source for x86 architectures. The Pi situation is more difficult. Ideally one needs PCIe3 atomics but the Pi 5 is officially PCIe2 and it's not clear the PCIe3 implementation includes atomics.
If I were doing this, I'd try getting ROCm to work on the Ampere Altra hardware first. If that doesn't provide a development and runtime environment which could be directly transferred to a Pi, it would at least provide experience getting everything built for ARM.
In Jeff Gerling video with Pi5 and external RX 460 GPU he used Pineberry uPCity board that was not available at the time.
Now it is:
https://pineboards.io/products/hat-upci ... berry-pi-5
But for that price I get a whole PC with gen3 x16 PCIE slot on ebay auction, and there I can just install ROCM from Ubuntu package manager without need to build it ...
P.S:
I learned on mersenneforum.org that people use multiple GPU systems, and that open mining rig might be a multiple GPU option as well. I bought a mainboard plus CPU bundle cheaper than 4GB Pi5, which has 7× x16 slots, 4 of which run gen2. I will use that as my open multi GPU playground in future:
https://www.ebay.de/itm/196934740315
P.P.S:
Regarding cheap systems, I bought a 28C/56T server for slightly more than a 4GB Pi5:
https://www.ebay.de/itm/396005967142
The reason for low price was "no RAM/no HDDs", but those can be added as needed.
A single 16GB ECC memory module for less than 20 USD, instead from HDD the system can boot from USB stick for early testing.
HDD caddies 3Dprinted from https://www.thingiverse.com/thing:6214020.
honeycomb filler from my JSCAD app share URL:
Statistics: Posted by HermannSW — Thu Jan 23, 2025 9:19 pm